/Engine/Source/Runtime/Core/Public/Containers/UnrealString.h
Format the specified string using the specified arguments. Replaces instances of { Argument } with keys in the map matching 'Argument'
A string containing the formatted text
static [FString](API\Runtime\Core\Containers\FString) Format ( const TCHAR * InFormatString, const FStringFormatNamedArguments & InNamedArguments )